#400 What's New in Rails 4

git clone https://github.com/rails/rails.git
cd rails
bundle
gem install bundler --pre
bundle
railties/bin/rails new ~/code/blog --edge -d postgresql
mate ~/code/blog
cd ~/code/blog
rake db:create
rails g scaffold article name content:text published_on:date tags properties:hstore
rake db:migrate
rails c

Article.create! name: "Hello", tags: %w[ruby rails], properties: {author: "Ryan"}
Article.first.tags
Article.first.properties
Article.all.class
Article.scoped
Article.all.to_a
Article.all.load.class
Article.none
Article.where.not(name: "Hello")
Article.order(name: :desc)
as = Article.all;
as.where!(name: "Hello"); # note this is only intended to be used by Rails internals
as
Article.find_by name: "Hello"
Article.find_or_create_by name: "Hello"
class Message
include ActiveModel::Model
attr_accessor :name, :content
end
m = Message.new(name: "Foo")
m.name
app.foo_url

execute "create extension hstore"
create_table :articles do |t|
  t.string :name
  t.text :content
  t.date :published_on
  t.string :tags, array: true
  t.hstore :properties
  t.timestamps
end

scope :sorted, -> { order(:name) }

<%= f.date_field :published_on %>
...
<%= f.collection_check_boxes :tags, %w[ruby rails design], :to_s, :to_s %>

content_tag(:h1, "Edit") + render("form")

concern :commentable do
  resources :comments
end
resources :articles, concerns: :commentable
resources :photos, concerns: :commentable

get 'foo', to: 'articles#index', constraints: {protocol: "https", subdomain: "test"}

# also need to add pry to Gemfile
console do
  require "pry"
  config.console = Pry
end